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CVE-2026-15588VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-15588· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium.

Data as of 30 Oct 2026, 01:02 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.15.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10glib2Affected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportglib2Affected–Fixed in–
Red Hat Enterprise Linux 7 Extended Lifecycle Supportglib2Affected–Fixed in–
Red Hat Enterprise Linux 8glib2Affected–Fixed in–
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportglib2Affected–Fixed in–
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onglib2Affected–Fixed in–

AI-suggested

A security update is available from Red Hat for the affected glib2 packages in Red Hat Hardened Images (version 2.89.2-2.hum1). Applying this update is the recommended remediation. No other mitigations currently meet Red Hat's criteria for ease of use, applicability, or stability. Users should follow Red Hat's update instructions at https://images.redhat.com/ to apply the fix.

Description

A denial-of-service (DoS) vulnerability exists in the GDBus component of GLib used in Red Hat Hardened Images. The gdbusauth authentication mechanism does not enforce length limits on data lines from clients, allowing unauthenticated local or remote attackers to send excessively long data streams. This causes excessive memory and CPU consumption, potentially crashing or hanging affected applications or systems. No mitigation other than updating is currently available that meets Red Hat's criteria.

References

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